RE: Adjust poundage, Retune?
It depends how close to the EDGE you are in spine, foc, broadhead weight etc.
I know on my setup If I back the limbs off 1 turn everything goes haywire. It shoots fantastic where im at but ive fine tuned it near the edge. All you can do is try it and see. Check your paper tune right before and right after adjusting and see where your at.